Sinnoh's got fog. Lots of fog. Enough fog to make us question the fact that it's Galar with the whole UK vibe going on. And while finding the Defog HM in Pokemon Brilliant Diamond & Shining Pearl isn't strictly necessary to complete the game, it's a handy move to have around. Frankly, if there were an "honorary necessity" category, Defog would be all over it.
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This guide demystifies the search for Defog. Where can
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